/* ==========================================================================
   Treat Your Teacher -- Base Styles (base.css)
   Body, layout containers, section rhythm, global utilities.
   ========================================================================== */

body {
  font-family: var(--font-body);
  font-size: var(--size-body);
  font-weight: 400;
  color: var(--text-primary);
  background-color: var(--bg-page);
  line-height: 1.65;
  overflow-x: hidden;
}

/* ---- Container ---- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--sp-5);
  padding-right: var(--sp-5);
}

.container--narrow {
  max-width: 900px;
}

.container--tight {
  max-width: 680px;
}

.container--form {
  max-width: 640px;
}

/* ---- Section rhythm ---- */
section {
  padding-top: var(--sp-10);
  padding-bottom: var(--sp-10);
  position: relative;
}

section.bg-cream  { background-color: var(--bg-page); }
section.bg-white  { background-color: var(--bg-section-alt); }
section.bg-dark   { background-color: var(--bg-dark); color: rgba(255, 248, 240, 0.85); }
section.bg-coral  {
  background: linear-gradient(135deg, var(--coral) 0%, var(--coral-hover) 100%);
  color: var(--white);
}

/* ---- Eyebrow labels ---- */
.eyebrow {
  display: inline-block;
  font-family: var(--font-display);
  font-size: var(--size-h4);
  font-weight: 700;
  color: var(--coral);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--sp-4);
}

/* ---- Accent spans inside headings ---- */
.accent {
  color: var(--coral);
}

/* ---- Lead paragraphs ---- */
.lead {
  font-size: var(--size-body-lg);
  color: var(--text-secondary);
  max-width: 680px;
  line-height: 1.6;
}

/* ---- Body text max-width ---- */
.body-text {
  max-width: 680px;
  line-height: 1.65;
}

/* ---- Two-column grid ---- */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-6);
  align-items: start;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-6);
  align-items: start;
}

/* ---- Responsive section spacing ---- */
@media (max-width: 1024px) {
  section {
    padding-top: var(--sp-8);
    padding-bottom: var(--sp-8);
  }
}

@media (max-width: 640px) {
  section {
    padding-top: var(--sp-8);
    padding-bottom: var(--sp-8);
  }

  .container {
    padding-left: var(--sp-4);
    padding-right: var(--sp-4);
  }

  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }
}

/* ---- Visually hidden (screen readers only) ---- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}